Door-lock



(No Model.)

A. GREDELL & W. F. PADE'N.

' DOOR LOGK.

No. 534,559. Patented P 5. 19', 1895.

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. cent cylinders are substantially thus formed.

WVILLIAM F. PADEN, citizens of the United UNITED STATES PATENT EEicE.

ALBERT GREDELL AND WVILLIAM F. PADEN, OF ST. LOUIS, MISSOURI.

LOCK.

SPECIFICATION forming part of Letters Patent No. 534,559, dated February 19, 1 895.

Application filed April 13, 1894.

To on whom it may concern.-

Be it known that we, ALBERT GREDELL and States, residing at St. Louis, Missouri, have jointly invented certain new and useful Improvements in Door-Locks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

Our invention has relation to improvements in door locks and consists in the novel arrangement and combination of parts more fully set forth in the specification and pointed out in the claim.

In the drawings,Figure 1 is a plan view of the casing of the lock. Fig. 2 is a plan view of the inside of the lock with one of the sections of the casing removed. Fig. 3 is an inside view of the removed section. Fig. 4 is a plan view of the key. Fig. 5 is a front view of the outer flange of the casing. Fig. 6 is a section on the line ma: of Fig. 2. Fig. 7 is asection on the line y-y of Fig. 2. Fig. 8 is a detached view of the stem of the spring latch; and Fig. 9 is a detached view of the movable plate that operates the door latch.

The object of our invention is to construct a door lock which shall be compact and simple, one that can be readily inserted into the door frame with the removal of the minimum amount of wood from the door, and one that can not readily be picked.

1 Tothis endthe invention consists as folows:

Referring to the drawings, the casing of the lock which confines the operating parts is composed of sections 1 and 2, each section be ing of the form of two contiguous or intersecting semi-cylinders so that when the sections are brought or fitted together two adja- To insert the look into the door two contiguous or intersecting cylindrical openings are bored in the door frame and the casing is readily then inserted into the resulting cavity, the front of the lock being provided with a flange 3 to readily cover the front of the opening thus formed in the door, the said flange having a'bevel edge t to more readily enter the countersink formed for its reception. The lock is then secured by suitable Serial lie-507,391. (No modelfi screws passed through the openings 5, 5, in said flange.

The operating parts of the lock'are confined within section 2, the section 1 being used as a covering therefor, the two sections being secured together by a screw 6 passing through the registering openings 7 and 8 of the respective sections. The opening here described for the reception of the casing being composed of ,two semi-cylindrical openings intersecting one another, forms a recep tacle which does not permit the casing toturn or become displaced, being in this respect superior to a round or cylindrical opening;

and being superior to a rectangular opening since the lock can be constructed with certain alterations in more compact form.

The latch 9 operated by the turning of the door knob has its stem 10 operating within an opening formed in the front of the casing, and within an opening formed by the semicylindrical walls 11 formed in each of the semi-cylinders 0f the casing, the said stem projecting a suitable distance beyond said walls and carrying a terminal cross piece 12 one end of which always operates within the longitudinal slot 13 of the movable plate 14 operated in the usual Way by the rocking T- shaped plate 15 which latter is rocked by the shank of the door knob passing through the rectangular opening 16 at the pivotal end thereof.

A coiled spring 17 confined between the front inner wall of the casing and the walls 11 and encircling the stem 10 restores the latch 9 to its normal position. The latch 9 with its stem 10 can of course be reversed so that the opposite end of the cross piece 12 can operate within the slot 13, thus enabling the lock to be converted from aright hand to aleft hand, and vice versa, or according to the direction the door shall open.

The bolt 18 has its flattened extension 19 confined between tumblers 20 and 21 (one on each side thereof) each tumbler being provided with a series of processes or projections 22 forming a series of notches 23, the said notches being made to receive a projection or a pin 24 on the extension 19 and normally held thereon by the flexed springs 25 having ICC one end secured to the forward portion of the tumblers, and the free end of said springs bearing against the partition wall 26 between the two semi-cylinders of the section 2 of the casing. With the turning of the key the tumblers are raised and the bolt is pushed forward allowing the same to advance one notch; and with a second turning of the key the operation is repeated,the bolt advancing a second notch, it requiring two turns of the key to insure against picking of the look.

It is to be noted that thetumblers are each pivoted at one end to a projecting pin 27 on each section, the pin passing through an opening 28 for its reception in each tumbler. An inspection of Fig. 2 will at once disclose that by turning the key each tumbler is thus raised about its pivotal point and at the same time the bolt is advanced the key entering the depressions in the extension'of the bolt in a manner well known.

The form of the plate 14 is shown in detached view in Fig. 9, and as seen from said figure, and from Fig. 7, it has terminal wings 29 to better guide it in itsmovement within the casing.

The two sections of the casing are suitably hollowed out to receive such parts as the bolt, and latch-stem with itsencircling spring, the remaining parts of each section being cast solid as shown in Fig. 3, the adjacent surfaces of the solid portions serving to guide in their movements such parts as the plate 14, tumblers and 21, and the rocking T-shaped plate 15. The casing as a Whole has a slight taper from the front to the rear as best seen in Fig. 1, to allow for the more ready insertion of the same into the cavity of the door formed for its reception. Each section has an opening 30 of suificient diameter to allow for the passage of the shank of the door-knob.

Having described our invention, what we claim is A look comprising two sections, each section being composed of two contiguous or intersecting and slightly tapering semi-cylindrical compartments, a hollow portion and a solid portion for each compartment, a springoperated latch in the hollow portion of one compartment, a stem secured to said latch, adjacent semi-circular Walls on the sections embracing and guiding the stem, a terminal cross-piece on said stem, a slotted movable plate mounted on the solid portion of both compartments, said terminal cross-piece operating within the said movable plate, and

means for operating said plate, a partition wall interposed between the semi-cylinders of the respective sections, a suitable bolt in the hollow portion of the second compartment, a suitable extension on said bolt, tumblers disposed on either side of the extension, and a flexed spring having one end secured to the tumblers and the free end bearing against the partition wall, substantially as set forth.

In testimony whereof we affix our signatures in the presence of tWo witnesses.

ALBERT GREDELL. WILLIAM F. 'PADEN.

YVitnesses:

EMIL STAREK, JAMES J. ODoNoHoE. 

